feat(admin): 首页门面数字保底/护栏 + 轮播种子真实化与批量 + 比价记录索引 (#42)

- ops_stat: 真实值 offset→保底(max);初始基数过只增不减护栏
- ops_marquee: 脱敏名手机尾号+中文昵称混合;金额长尾;时间随机抖动;真实+种子不足兜底补满;真实记录查询 ~30s 缓存
- comparison_record: 复合索引 (status, created_at) + 迁移(PG CONCURRENTLY);修复 alembic 多 head(merge 改挂 onboarding_completion)
- 轮播种子批量删除/启用接口 + ids 上限;docs 同步
- 附带并行会话 WIP:admin users / wallet

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: OuYingJun1024 <1034284404@qq.com>
Reviewed-on: #42
Co-authored-by: ouzhou <ouzhou@wonderable.ai>
Co-committed-by: ouzhou <ouzhou@wonderable.ai>

alembic/versions/comparison_status_created_idx.py

@@ -0,0 +1,48 @@
+"""add composite index (status, created_at) on comparison_record
+
+首页轮播 feed(按 status='success' 过滤 + created_at 近期排序)与省钱战绩聚合
+都吃这个过滤+排序;复合索引避免随数据量增大退化成全表扫。
+
+Revision ID: comparison_status_created_idx
+Revises: a8c47fc4dc39
+Create Date: 2026-06-10
+"""
+
+from __future__ import annotations
+
+from alembic import op
+
+revision = "comparison_status_created_idx"
+down_revision = "a8c47fc4dc39"
+branch_labels = None
+depends_on = None
+
+INDEX_NAME = "ix_comparison_status_created"
+
+
+def upgrade() -> None:
+    bind = op.get_bind()
+    if bind.dialect.name == "postgresql":
+        # PG 上 comparison_record 已有数据量, 普通 CREATE INDEX 持表写锁会阻塞线上写入;
+        # 用 CONCURRENTLY 不锁表(须脱离事务, autocommit_block 切到自动提交)。
+        with op.get_context().autocommit_block():
+            op.create_index(
+                INDEX_NAME, "comparison_record", ["status", "created_at"],
+                unique=False, postgresql_concurrently=True,
+            )
+    else:
+        op.create_index(
+            INDEX_NAME, "comparison_record", ["status", "created_at"], unique=False
+        )
+
+
+def downgrade() -> None:
+    bind = op.get_bind()
+    if bind.dialect.name == "postgresql":
+        with op.get_context().autocommit_block():
+            op.drop_index(
+                INDEX_NAME, table_name="comparison_record",
+                postgresql_concurrently=True,
+            )
+    else:
+        op.drop_index(INDEX_NAME, table_name="comparison_record")

alembic/versions/d4b87c5847de_merge_comparison_idx_and_coupon_daily_.py

@@ -0,0 +1,26 @@
+"""merge comparison idx and coupon daily completion heads
+
+Revision ID: d4b87c5847de
+Revises: comparison_status_created_idx, onboarding_completion
+Create Date: 2026-06-10 16:45:50.285917
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = 'd4b87c5847de'
+down_revision: Union[str, Sequence[str], None] = ('comparison_status_created_idx', 'onboarding_completion')
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    pass
+
+
+def downgrade() -> None:
+    pass